Launched from 1 14-m rail launcher. All three motors ignited at launch. The two boosters separated at T+2,3 seconds and 440 m altitude. The sustainer burned out at T+18 seconds at a velocity of 1540 m/s. The dart then separated and coasted to 90 km altitude, where two payloads were released: a chaff cloud and the parachute-borne Ramses radiosonde.